r1453945 broke immutability

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1659958 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/commons/compress/compressors/CompressorStreamFactory.java b/src/main/java/org/apache/commons/compress/compressors/CompressorStreamFactory.java
index 7442ba1..0b8c640 100644
--- a/src/main/java/org/apache/commons/compress/compressors/CompressorStreamFactory.java
+++ b/src/main/java/org/apache/commons/compress/compressors/CompressorStreamFactory.java
@@ -63,7 +63,6 @@
  * in.close();
  * </pre>
  * 
- * @Immutable
  */
 public class CompressorStreamFactory {